This MIB module defines the textual conventions 
used in the enhanced image MIB.

Glossary:

Base Image 
     Essential part of the operating system,
     which forms base functionality on top of 
     which patches can be added. 

MBI (Minimum bootable image) 
     A small image which contains the smallest 
     possible amount of functionality required to 
     bootstrap and load a full image.  This image 
     typically contains the kernel, the file system
     drivers, and some hardware initialization code.
     It is executed at boot-up, and initializes just
     enough to access the rest of the code, and 
     run it.

Modular operating system 
     An operating system that exhibits runtime 
     modularity characteristics, such as multiple 
     address spaces, fault isolation between 
     processes, and modularity delivery and 
     replacement of image components.

Patch/Package/SMU (software maintenance upgrade)
     A modular replacement for some piece of on-box 
     content, such as a binary shared object, or a 
     text file.  This entity is meant to replace or 
     augment something that is already part of the 
     base image.

Composite package 
     Group of packages delivered as a bundle.  It is
     meant to be loaded on MBI.

Script
     A non-binary piece of on-box content, typically
     a TCL script for use by the TCL interpreter, or
     some other form of interpreted router content.

Installable 
     An installable can be a patch, package, composite
     package, SMU or script.  It is a piece of 
     software which can be loaded on to the base 
     image on a system.